New features:

  • Raspberry Pi PICO RP2040
  • 2" IPS LCD 320x240 ST7789
  • 36 buttons keyboard
  • RFM95 LoRa radio module
  • Main software in circuit python, fully open and transparent
  • Encryption AES256
  • USB-C power supply
  • 10cm x 10cm x 1cm dimensions

Quick preview:

3D Enclosure design: